Raising and lowering device for pivot-wheel cultivators.



G. DEPREESE.

RAISING AND LOWERING DEVICE FOR PIVOT WHEEL GULTIVATOBS.

APPLICATION FILED JUNE 1, 1914.

1,1 17,804. Patented Nov. 17, 1914 2 SHEETSSHEET 1.

awn/who's QWW a W THE NORRIS FErERs 60.. PHUTO LITNOH WASHINGYON. 3. C.

LI l. v I .l m m, I. 4 lllllll! 1 .1 1 I Patented Nov. 17, 1914.

G. DEFREBSE.

RAISING AND LOWERING DEVICE FOR PIVOT WHEEL GULTIVATORS.

APPLICATION FILED JUNE 1, 1914.

THE NORRIS PETERS 60.. PHOTD-LITHQ. WASHINGTON I1 I fi/n CHARLES DEFREESE, OF WES'IPOINT, INDIANA.

RAISING AND LOWERING DEVICE FOR PIVOT-WHEEL CULTIVATORS.

Specification of Letters Patent.

Patented Nov. 17, 1914.

Application filed June 1, 1914. Serial No. 842,250.

To all whom it may concern Be it known that I, CHARLES Dnrnnnsn, a citizen of the United States, residing at Westpoint, in the county of Tippecanoe and State of Indiana, have invented certain new and useful Improvements in Raising and Lowering Devices for Pivot-Vheel Cultivators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in raising and lowering means for cultivator-s and similar agricultural implements and more particularly to those having supporting wheels whose axles are pivoted to swing in horizontal planes.

The primary object of the invention is to provide a device of this character which may be simply and inexpensively constructed and which may be used to great advantage, more particularly when one wheel of the implement runs upon a surface lower than the opposite wheel thereof.

A secondary object of the invention is to construct and mount a segmental rack in such a manner as to allow the same to form a pivotal support as well as a locking means for a raising and lowering lever.

A still further object is to construct said rack in such a manner as to provide a rigid thrust hearing which supports the weight of the implement above the wheel to which it is applied.

A still further object is to provide simple and efficient means whereby the operator may be assisted in raising the implement proper upon its wheels and axles.

WVith these objects in view, the invention resides in certain novel features of construction and combination herein described and claimed and shown in the drawings wherein Figure 1 is a side elevation, partly in section, of a pivot wheel cultivator, showing the application of my invention thereto; Fig. 2 is a rear elevation of portions of the parts shown in Fig. 1; Fig. 3 is a top plan view thereof; Fig. 4. is a vertical transverse section taken along the plane of the line H of Fig. 1; Fig. 5 is a similar view on the line 5-5 ofFigl; Fig. 6 is a verticalsection taken along the plane of the line 6-6 of Fig. 2.

In the accompanying drawings, I hav illustrated my invention in connection with a pivot wheel cultivator C, the latter having a pair of upright bearings B which are rigidly carried thereby and in which upright extensions E of supporting axles A are mounted for vertical and rotary movement, the upper ends of said extensions E projecting a suitable distance above the bearings B and being squared as indicated at Sfor the reception of the inner ends of steering arms a, the latter, 0n the opposite sides of the machine. being connected by a transverse steering rod R. The features so far described and the wheels IV, mounted on th axles A, are of common construction and form no part of the present invention although a certain coaction exists between the two.

Disposed in rear of each extension E, is a segmental rack 1 said racks being formed integrally with upright portions 2 and horizontal bars 3, the former being provided with forwardly projecting thrust bearings 4 which are disposed near their lower ends and beneath the arms a, other bearings 5 being formed integrally with the upperends of the portions 2 vand having openings alining with the openings in the thrust bearings 4. As clearly shown in the drawings, the thrust bearings 4 loosely receive the upper portions ofthe extensions E and the bearings 5 likewise loosely receive the extreme upper ends of said extensions which are reduced and externally threaded for the reception of nuts N whereby the racks 1 and the steering arms a; are held against dislocation.

F or the purpose of relieving the bearings 5 of unnecessary strain. I have provided the thrust bearings 4 with the under sides of which collars 6, secured to the extensions E by means of set screws. contact. thereby causing the maior part of the strain to be exerted upon the bearings 4 which are of considerably greater size than said bearings 5.

In order that the bearings B may be raised or lowered upon the extensions E thereby raising and lowering the entire cultivator proper, I have provided a pair of lovers 7,

the latter being pivoted at 8 to the angular corners of the racks 1 and having their free ends'slightly offset and pivotally connected by means of links 9' to ears 10 which are formed on sections 11 of clamps, said sections 11 and their complementary members 12 embracing said bearings B and being rigidly held thereon by means of clamping bolts 13. It will therefore be seen that when the levers 7 are rocked around their;

pivots 8, their free ends, in moving upwardly or downwardly as'the case may be,

will likewise move theclamps anol'the bearin s thus raisin or lowerin the cultivator b 7 b b to the proper extent. For the purpose of securely locking the levers 7 in any oneof their adjusted positions, I provide locking pawls 14 which are normally projected by means of coil springs 15 and which may be retracted by thumb levers 16, through the instrumentality of connecting links 17.

It will of 4 course be obvious that the weight ofthe cultivator will allow the lowering operation thereof to be a simple one. When the cultivator is to be raised-however, considerably more power is required and I have therefore provided coil springs a 18 which lie substantially parallel to the levers '7 and have their rear ends secured to clamps 19 which are mounted upon said levers, the forward ends of said strips being secured to depending extensions 20 of up- -right bars 21 through which the pivots8 tions 2 of the racks.

pass and whose upper ends are deflected laterally and provided with attaching lugs" The device, as above set forth .and de vscribed becomes particularly advantageous when cultivating land having numerous fur- 7 rows, in which operation it often becomes horizontal plane thus causing the soil to beuniformly gworked orcultivatedfl necessary to position one side wheel of the cultivator in one of the furrows. This of course lowers this side of the machine and would. under ordinary circumstances-cause the cultivator teeth upon this side to work the earth more deeply than those on the opposite side of the machine. By the use of my invention, however, the active faces of the cultivator teeth may be kept in the same I have described my invention withconsiderable minuteness and have set forth certain specific embodiments for'ca'r'rying out the objects of the invention. I wish it understood however, that I do not wish to be limited to details of construction otherthan those amplified in the appended claims. Particular emphasis however is laid upon the positioning of the bearings a and 5, in connection with:the remaining features of the invention, since the thrust bearings B, as hereinbefore set-forth receive practically all ofthe weight of the cultivator while the bearings 5 act as bracing means to prevent the racks from tilting and thereby binding the extensions E to such an extent as to prevent their proper rotation for the purpose of steering. It will furthermore be noted that said bearings 5 securely hold the arms a against dislocation.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with an implement having a supporting axle provided with an upright extension having a removable steering arm, and a supporting frame having a portion loosely receiving said extension, of a segmental rack adjacentthe extension and having a pair of vertically spaced bearings mounted thereon above and below the steer-' ing arm whereby the latter is held against removal, means whereby said bearings are held against longitudinal movement on the extension, and a lever pivoted to said rack and to a portion of the frame, said lever having a pawl coacting with the racln l 2. The combination with an implement having a supporting axle provided with an upright extension havmg a removable steering arm and a supporting frame having a portion loosely receiving said extension, of

a segmental rack having an elongated thrust bearing and an ear mounted on said extension respectively below and above the arm whereby the latter is held against removal, a stop on the extension and bearing against the'thrust bearing, and a lever pivoted .to said rack and to a portion of the frame, said lever having a pawl coacting with'said rack.

3. The combination with an L-shaped axle having a wheel revolubly mounted on its horizontal arm, a frame having a'bearing' slidable vertically on the upright arm ofsaid axle, the upper portion of said upright.

arm being squared and provided with a threaded extension, and a steering arm revolubly mounted onrsaid squared portion, of an upright segmental rack adjacent said upright arm, a thrust bearing formed in-" tegrally with saidrack and embracing said upright arm below the steering arm," abear-t ing ear likewise formed integrally with said".

rack and embracing the threaded-extension above the steering arm, a stop on the up- In testimony whereof I have hereunto set right arm below the thrust bearing, a nut my hand in presence of two subscribing witon the threaded extension and bearing nesses.

against said ear, a lever pivoted to said rack CHARLES DEF REESE. and pivotally connected to a portion of the Witnesses:

frame, and a pawl on the lever coacting with JOSEPH DE FREESE,

the latter. JOHN D. GOUGAR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

